AIRCRAFT MAINTENANCE MANUAL
DFE-AMM-AR1
Rev. 1 – 07/24/2014
3-9
3.4.2. Instructions for Authorized Maintenance, Repair or Alterations
3.4.2.1.
HTU to Fuselage Assembly
•
Tools needed: Metric Wrench, Torque Meter.
•
Parts needed: Bolts, nuts, washers and grease.
•
Type of maintenance: Heavy
•
Level of Certification needed:
−
Repairman (LS-M) or Mechanic (A&P) – both with the minimum level of certification to
perform heavy maintenance of SLSA in the U.S.
−
FAA approved Part 145 Repair station
•
Instructions:
1. Make the connecting components ready, clean and lubricate HTU suspensions.
2. Insert the HTU from the rear into the fuselage as far as the stabilizer will go into the two
pins in the front, and the two bolts (M8) in the rear
3. Put the washers on the M8 bolts. Screw on the nuts
4. Insert the M8 bolt to connect the elevator control hinge with the control rod. Put on a
washer, and self-locking nut.
5. Connect trim tab wires.
6. Adjust the elevator and trim tab deflections (see 3.6.2.2)
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Task proper accomplishment check:
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Check proper attachment of trim control wires
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Check HTU proper attachment and securing of all joints
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Check elevator and trim tab deflection
3.4.2.2.
HTU From Fuselage Disassembly
•
Tools needed: Metric Wrench.
•
Parts needed: None.
•
Type of maintenance: Heavy
•
Level of Certification needed:
−
Repairman (LS-M) or Mechanic (A&P) – both with the minimum level of certification to
perform heavy maintenance of SLSA in the U.S.
−
FAA approved Part 145 Repair station
•
Instructions:
Unscrew attachment bolts of HTU-fuselage fiberglass cover.
1. Disconnect the trim tab wires.
2. Disconnect the elevator control cables.
3. Remove the safety pins securing the castle nuts on the bolts of the stabilizer rear
suspensions. Screw off the nuts and remove the washers.
4. Draw the HTU out of the fuselage.
5. Put connecting components in a safe place to avoid loosing them
•
Task proper accomplishment check: Visually check that nothing was damaged on the
airplane due to HTU removal.
